The research team was studying melanopsin—a light sensitive pigment in photoreceptor cells. Prior research has suggested that the amount of melanopsin present has an impact on the circadian rhythm of certain animals, possibly including humans. To learn more, the researchers sought out volunteers to undergo fMRI scans as lights were shined in their eyes. The idea was to find out if different light colors impacted melanopsin differently.
Each of 16 volunteers was treated to a ten minute shot of blue or orang light as their brains were being scanned. During the test, the volunteers were asked to perform a memory test, to engage the brain.
Read more at: MedicalXpress